Maintenance
SS-SVX002B-EN
41
making accurate acid measurements, but if they are not
available, a check of the oil by sight and smell can give a
quick indication if contamination remains in the system.
WARNING
Risk of Burns!
Avoid touching or contacting the gas and oil with
exposed skin. Severe burns will result. Use long rubber
gloves in handling contaminated parts.
All electrical connections should be checked to ensure they
are tight and properly made. Check all circuit breakers,
contactors and wiring. The contactors should be
examined and replaced if contacts are worn or pitted.
If there is acid in the oil, there has been an electrical failure
which has caused the compressor motor to burn out. The
acid diffuses throughout the refrigeration system and
must be removed by using a burnout filter kit before a new
compressor is placed in service. Not only must the com-
pressor be replaced, but also the entire refrigeration circuit
must be cleaned of the harmful contaminants left by the
burnout. See
“Burn-Out/Acidic Cleanup Procedure,” p. 41
for the proper cleaning procedure.
If there is no acid in the oil, there has been a mechanical
failure. See
“Standard Cleanout Procedure,” p. 41
proper cleaning procedure.
Important:
Damage to a replacement compressor
caused by improper system cleaning
constitutes abuse under the terms of the
warranty. This will VOID THE
COMPRESSOR WARRANTY. Always
consult the factory prior to replacing the
compressor.
POE oil is used in systems with R-410A refrigerant. If a
replacement compressor is provided, ensure that it is filled
with POE oil before installing.
Standard Cleanout Procedure
Note:
Cleaning operations must be performed by a
journeyman, refrigeration mechanic, or air
conditioning technician.
10. Turn off power to the unit at the main power dis-
connect switch.
11. Remove the old compressor and install the new
compressor.
12. Remove the liquid line drier and install an oversized
liquid line filter-drier (one size larger than the normal
selection size).
13. Evacuate the system according to standard
procedures. Normally, this will include the use of a
high-vacuum pump and a low-vacuum micron gauge
for measuring the vacuum obtained.
14. Recharge the system.
15. Turn on the power at the main power disconnect switch
and start the system at the controller.
Burn-Out/Acidic Cleanup Procedure
WARNING
Risk of Burns!
Avoid touching or contacting the gas and oil with
exposed skin. Severe burns will result. Use long rubber
gloves in handling contaminated parts.
Note:
Cleaning operations must be performed by a
journeyman, refrigeration mechanic, or air
conditioning technician.
1. These systems should be cleaned using the suction
line filter-drier method.
2. Turn off power to the unit at the main power dis-
connect switch.
3. Remove the burned out compressor and install the
new compressor.
4. Install a suction line filter-drier designed for acid
removal.
5. Remove the liquid line drier and install an oversized
liquid line filter-drier (one size larger than the normal
selection size).
6. Check the expansion valve, sight glass and other
controls to see if cleaning or replacement is required.
7. Evacuate the system according to standard
procedures. Normally, this will include the use of a
high- vacuum pump and a low-vacuum micron gauge
for measuring the vacuum obtained.
8. Recharge the system through the access valve on the
suction line filter-drier.
9. Turn on power at the main power disconnect switch
and start the system at the controller.
10. The permanently installed suction line filter-drier
permits small-system cleanup to be completed in one
service call. The pressure drop across the suction line
filter-drier should be measured during the first hour of
operation. If the pressure drop becomes excessive, the
suction line filter-drier should be replaced (See Sporlan
Bulletin 40-10, for the maximum recommended
pressure drop (PSI) for the suction line filter drier).
11. In 24 hours, take an oil sample. Observe the color and
test for acidity. If the oil is dirty or acidic, replace the
suction line filter-drier.
12. In 2 weeks, examine oil to determine if another suction
line filter-drier change is necessary.
Humidifier Cylinder Replacement
After an extended period of operation, the yellow LED on
the humidifier cabinet will repeatedly flash four times
indicating that the cylinder is completely used and a
replacement cylinder must be installed. The cylinder is
disposable and cylinder life is dependent on water supply
conditions and humidifier usage. Refer to the humidifier
operator’s manual supplied under separate cover for
